Abstract: The principle and method of Fractal geometry can be applied to conventional core analysis, including capillary pressure curves in-versed from porosity and permeability data in order to develop the model for prediction of pore throat volume distribution. The real data verify the validity of this method. The capillary pressure curves contain much information about reservoir features, so a series of geologic applications in terms of fractal geometry principle are presented to estimation of reservoir relative permeability; contribution value calculation of arbitrary-interval permeability; evaluation of reservoir heterogeneity; determination of pore-throat radius cutoff; classification of reservoir and non-reser-voir and their quantitative evaluations; quantitative evaluation of flowing pore space and its validity,and estimation of initial oil saturation in reservoir, etc. These provide novel ways for study of pore structure at non-coring intervals and evaluation of reservoirs.

Key words: porosity, permeability, inversion, capillary pressure, fractal geometry